Use Enzyme to test React/Redux container - dispatch

ShowBox.spec.js

  it("should render a text box with no string inside if search string is not provided by store", () => {
    const testState = {
      showBox: {
        search: ""
      }
    };
    const store = createMockStore(testState)
    const component = shallowWithStore(<ConnectedShowBox />, store);
    
    component.dive().find("form > div > input").simulate("change", { target: { value: "Site" } });
    expect(component.dive().find("d").prop("value")).to.equal("Site")
    
    
    component.dive().find("form").simulate("submit");
    expect(store.isActionDispatched({
      type: "showBox/SUBMIT",
      searchString: "Site"
    })).to.be.true;
  });